!Priest Cerenas:

 If you enter the Imperial Tomb, or fight in the Shrine of the Loyal near the Wall of Argos, you will be able to meet the Archon or Inferiors of Halisha. You can get this stone if you defeat them.%%
Do you understand? If you want this stone, you need to defeat* Halisha's Inferiors or Archon*. The Stone of Commune will let you know where the fifth tablet is.